1/* $KAME: ipsec_dump_policy.c,v 1.13 2002/06/27 14:35:11 itojun Exp $ */ 2 3/*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <sys/types.h> 35#include <sys/param.h> 36#include <sys/socket.h> 37 38#include <netipsec/key_var.h> 39#include <netinet/in.h> 40#include <netipsec/ipsec.h> 41 42#include <arpa/inet.h> 43 44#include <stdio.h> 45#include <stdlib.h> 46#include <string.h> 47#include <netdb.h> 48 49#include "ipsec_strerror.h" 50 51static const char *ipsp_dir_strs[] = { 52 "any", "in", "out", 53}; 54 55static const char *ipsp_policy_strs[] = { 56 "discard", "none", "ipsec", "entrust", "bypass", 57}; 58 59static char *ipsec_dump_ipsecrequest(char *, size_t, 60 struct sadb_x_ipsecrequest *, size_t); 61static int set_addresses(char *, size_t, struct sockaddr *, struct sockaddr *); 62static char *set_address(char *, size_t, struct sockaddr *); 63 64/* 65 * policy is sadb_x_policy buffer. 66 * Must call free() later. 67 * When delimiter == NULL, alternatively ' '(space) is applied. 68 */ 69char * 70ipsec_dump_policy(c_caddr_t policy, const char *delimiter) 71{ 72 const struct sadb_x_policy *xpl = (const struct sadb_x_policy *)policy; 73 struct sadb_x_ipsecrequest *xisr; 74 size_t off, buflen; 75 char *buf; 76 char isrbuf[1024]; 77 char *newbuf; 78 79 /* sanity check */ 80 if (policy == NULL) 81 return NULL; 82 if (xpl->sadb_x_policy_exttype != SADB_X_EXT_POLICY) { 83 __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; 84 return NULL; 85 } 86 87 /* set delimiter */ 88 if (delimiter == NULL) 89 delimiter = " "; 90 91 switch (xpl->sadb_x_policy_dir) { 92 case IPSEC_DIR_ANY: 93 case IPSEC_DIR_INBOUND: 94 case IPSEC_DIR_OUTBOUND: 95 break; 96 default: 97 __ipsec_errcode = EIPSEC_INVAL_DIR; 98 return NULL; 99 } 100 101 switch (xpl->sadb_x_policy_type) { 102 case IPSEC_POLICY_DISCARD: 103 case IPSEC_POLICY_NONE: 104 case IPSEC_POLICY_IPSEC: 105 case IPSEC_POLICY_BYPASS: 106 case IPSEC_POLICY_ENTRUST: 107 break; 108 default: 109 __ipsec_errcode = EIPSEC_INVAL_POLICY; 110 return NULL; 111 } 112 113 buflen = strlen(ipsp_dir_strs[xpl->sadb_x_policy_dir]) 114 + 1 /* space */ 115 + strlen(ipsp_policy_strs[xpl->sadb_x_policy_type]) 116 + 1; /* NUL */ 117 118 if ((buf = malloc(buflen)) == NULL) { 119 __ipsec_errcode = EIPSEC_NO_BUFS; 120 return NULL; 121 } 122 snprintf(buf, buflen, "%s %s", ipsp_dir_strs[xpl->sadb_x_policy_dir], 123 ipsp_policy_strs[xpl->sadb_x_policy_type]); 124 125 if (xpl->sadb_x_policy_type != IPSEC_POLICY_IPSEC) { 126 __ipsec_errcode = EIPSEC_NO_ERROR; 127 return buf; 128 } 129 130 /* count length of buffer for use */ 131 off = sizeof(*xpl); 132 while (off < PFKEY_EXTLEN(xpl)) { 133 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); 134 off += xisr->sadb_x_ipsecrequest_len; 135 } 136 137 /* validity check */ 138 if (off != PFKEY_EXTLEN(xpl)) { 139 __ipsec_errcode = EIPSEC_INVAL_SADBMSG; 140 free(buf); 141 return NULL; 142 } 143 144 off = sizeof(*xpl); 145 while (off < PFKEY_EXTLEN(xpl)) { 146 xisr = (struct sadb_x_ipsecrequest *)((caddr_t)xpl + off); 147 148 if (ipsec_dump_ipsecrequest(isrbuf, sizeof(isrbuf), xisr, 149 PFKEY_EXTLEN(xpl) - off) == NULL) { 150 free(buf); 151 return NULL; 152 } 153 154 buflen = strlen(buf) + strlen(delimiter) + strlen(isrbuf) + 1; 155 newbuf = (char *)realloc(buf, buflen); 156 if (newbuf == NULL) { 157 __ipsec_errcode = EIPSEC_NO_BUFS; 158 free(buf); 159 return NULL; 160 } 161 buf = newbuf; 162 snprintf(buf + strlen(buf), buflen - strlen(buf), 163 "%s%s", delimiter, isrbuf); 164 165 off += xisr->sadb_x_ipsecrequest_len; 166 } 167 168 __ipsec_errcode = EIPSEC_NO_ERROR; 169 return buf; 170} 171 172static char * 173ipsec_dump_ipsecrequest(char *buf, size_t len, struct sadb_x_ipsecrequest *xisr, 174 size_t bound) 175{ 176 const char *proto, *mode, *level; 177 char abuf[NI_MAXHOST * 2 + 2]; 178 179 if (xisr->sadb_x_ipsecrequest_len > bound) { 180 __ipsec_errcode = EIPSEC_INVAL_PROTO; 181 return NULL; 182 } 183 184 switch (xisr->sadb_x_ipsecrequest_proto) { 185 case IPPROTO_ESP: 186 proto = "esp"; 187 break; 188 case IPPROTO_AH: 189 proto = "ah"; 190 break; 191 case IPPROTO_IPCOMP: 192 proto = "ipcomp"; 193 break; 194 case IPPROTO_TCP: 195 proto = "tcp"; 196 break; 197 default: 198 __ipsec_errcode = EIPSEC_INVAL_PROTO; 199 return NULL; 200 } 201 202 switch (xisr->sadb_x_ipsecrequest_mode) { 203 case IPSEC_MODE_ANY: 204 mode = "any"; 205 break; 206 case IPSEC_MODE_TRANSPORT: 207 mode = "transport"; 208 break; 209 case IPSEC_MODE_TUNNEL: 210 mode = "tunnel"; 211 break; 212 default: 213 __ipsec_errcode = EIPSEC_INVAL_MODE; 214 return NULL; 215 } 216 217 abuf[0] = '\0'; 218 if (xisr->sadb_x_ipsecrequest_len > sizeof(*xisr)) { 219 struct sockaddr *sa1, *sa2; 220 caddr_t p; 221 222 p = (caddr_t)(xisr + 1); 223 sa1 = (struct sockaddr *)p; 224 sa2 = (struct sockaddr *)(p + sa1->sa_len); 225 if (sizeof(*xisr) + sa1->sa_len + sa2->sa_len != 226 xisr->sadb_x_ipsecrequest_len) { 227 __ipsec_errcode = EIPSEC_INVAL_ADDRESS; 228 return NULL; 229 } 230 if (set_addresses(abuf, sizeof(abuf), sa1, sa2) != 0) { 231 __ipsec_errcode = EIPSEC_INVAL_ADDRESS; 232 return NULL; 233 } 234 } 235 236 switch (xisr->sadb_x_ipsecrequest_level) { 237 case IPSEC_LEVEL_DEFAULT: 238 level = "default"; 239 break; 240 case IPSEC_LEVEL_USE: 241 level = "use"; 242 break; 243 case IPSEC_LEVEL_REQUIRE: 244 level = "require"; 245 break; 246 case IPSEC_LEVEL_UNIQUE: 247 level = "unique"; 248 break; 249 default: 250 __ipsec_errcode = EIPSEC_INVAL_LEVEL; 251 return NULL; 252 } 253 254 if (xisr->sadb_x_ipsecrequest_reqid == 0) 255 snprintf(buf, len, "%s/%s/%s/%s", proto, mode, abuf, level); 256 else { 257 int ch; 258 259 if (xisr->sadb_x_ipsecrequest_reqid > IPSEC_MANUAL_REQID_MAX) 260 ch = '#'; 261 else 262 ch = ':'; 263 snprintf(buf, len, "%s/%s/%s/%s%c%u", proto, mode, abuf, level, 264 ch, xisr->sadb_x_ipsecrequest_reqid); 265 } 266 267 return buf; 268} 269 270static int 271set_addresses(char *buf, size_t len, struct sockaddr *sa1, struct sockaddr *sa2) 272{ 273 char tmp1[NI_MAXHOST], tmp2[NI_MAXHOST]; 274 275 if (set_address(tmp1, sizeof(tmp1), sa1) == NULL || 276 set_address(tmp2, sizeof(tmp2), sa2) == NULL) 277 return -1; 278 if (strlen(tmp1) + 1 + strlen(tmp2) + 1 > len) 279 return -1; 280 snprintf(buf, len, "%s-%s", tmp1, tmp2); 281 return 0; 282} 283 284static char * 285set_address(char *buf, size_t len, struct sockaddr *sa) 286{ 287 const int niflags = NI_NUMERICHOST; 288 289 if (len < 1) 290 return NULL; 291 buf[0] = '\0'; 292 if (getnameinfo(sa, sa->sa_len, buf, len, NULL, 0, niflags) != 0) 293 return NULL; 294 return buf; 295} 296